Error for '-' as filename of a precompiled header (PR pch/78970)

2017-01-05  Martin Liska  <mliska@suse.cz>

	PR pch/78970
	* c-opts.c (c_common_post_options): Reject '-' filename for a precompiled
	header.
2017-01-05  Martin Liska  <mliska@suse.cz>

	PR pch/78970
	* gcc.c (lookup_compiler): Reject '-' filename for a precompiled
	header.

From-SVN: r244103

gcc/ChangeLog

+2017-01-05  Martin Liska  <mliska@suse.cz>
+
+	PR pch/78970
+	* gcc.c (lookup_compiler): Reject '-' filename for a precompiled
+	header.
+
 2017-01-05  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>
 
 	* config/s390/s390.c (s390_expand_setmem): Unroll the loop for

gcc/c-family/ChangeLog

+2017-01-05  Martin Liska  <mliska@suse.cz>
+
+	PR pch/78970
+	* c-opts.c (c_common_post_options): Reject '-' filename for a precompiled
+	header.
+
 2017-01-04  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/64767

gcc/c-family/c-opts.c

@@ -744,7 +744,12 @@ c_common_post_options (const char **pfilename)
       in_fnames[0] = "";
     }
   else if (strcmp (in_fnames[0], "-") == 0)
-    in_fnames[0] = "";
+    {
+      if (pch_file)
+	error ("cannot use %<-%> as input filename for a precompiled header");
+
+      in_fnames[0] = "";
+    }
 
   if (out_fname == NULL || !strcmp (out_fname, "-"))
     out_fname = "";

gcc/gcc.c

@@ -8325,7 +8325,16 @@ lookup_compiler (const char *name, size_t length, const char *language)
     {
       for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
 	if (cp->suffix[0] == '@' && !strcmp (cp->suffix + 1, language))
-	  return cp;
+	  {
+	    if (name != NULL && strcmp (name, "-") == 0
+		&& (strcmp (cp->suffix, "@c-header") == 0
+		    || strcmp (cp->suffix, "@c++-header") == 0))
+	      fatal_error (input_location,
+			   "cannot use %<-%> as input filename for a "
+			   "precompiled header");
+
+	    return cp;
+	  }
 
       error ("language %s not recognized", language);
       return 0;